中性点不接地电网单相接地故障特征仿真研究与新结论

Simulation of single-phase grounding fault on non-grounding neutral power system and new conclusions

介绍了中性点不接地电网单相接地故障建模与仿真过程,研究并分析了单相接地时故障线路相电流、相电压,三序电压分量、电流分量,以及经凯伦贝尔变换后的模电流、模电压的特点。最后总结出一般性的结论,其中关于零序电流的分布与经典理论有较大的区别。

The modeling and simulation of single-phase grounding fault on non-ground neutral power system are introduced. The three-phase currents and voltages are converted to positive, negative and zero sequence currents and voltages respectively,then to 0 α β amplitudes with Karenbauer conversion for further analysis. General conclusions are extracted and the difference of zero sequence current distribution from classical theory is found.